Finding the Fourth Proportional to 19,613.20, 27,066.39 and 10,660.72

Step by Step Solution

1. Step 1: Write the proportion equation
   19,613.20 : 27,066.39 = 10,660.72 : x
2. Step 2: Convert to fraction form
   19,613.20/27,066.39 = 10,660.72/x
3. Step 3: Cross multiply
   19,613.20x = 27,066.39 × 10,660.72
4. Step 4: Simplify right side
   19,613.20x = 288,547,279.01
5. Step 5: Solve for x
   x = 288,547,279.01/19,613.20
6. Step 6: Final answer
   x = 14,711.89